mutating trigger

What is mutating trigger? How do you resolve it?
If a trigger body is trying to update dependent tables, will it get a mutating error?

Mutating trigger has similar concept to that of deadlock. When a table is in the half way of executing a transaction and is the owner of a trigger and if the same table is accessed by the trigger somewhere else in the same time then at that instance mutating trigger occurs.

To avoid Mutating trigger there are many ways. One of the best approach is to make use of the after trigger which clearly takes care of concurrency problems associated with mutating triggers .When after trigger is used only after the process of current updating is finished the next process gets processed.

or in simple words,

If a trigger body is trying to update dependent tables the best approach in this case to avoid mutating trigger errors would be to make the transactions independent and not associated with triggers which is technically called as autonomous transactions.